[Java] Have CSharp namespace output manager follow same pattern as others.

Author: mjpt777

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/csharp/CSharpNamespaceOutputManager.java

@@ -20,6 +20,8 @@
 import org.agrona.Verify;
 
 import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 
 import static java.io.File.separatorChar;
 
@@ -69,6 +71,6 @@ public CSharpNamespaceOutputManager(final String baseDirectoryName, final String
     public Writer createOutput(final String name) throws IOException
     {
         final File targetFile = new File(outputDir, name + ".cs");
-        return new BufferedWriter(new OutputStreamWriter(new FileOutputStream(targetFile), "UTF-8"));
+        return Files.newBufferedWriter(targetFile.toPath(), StandardCharsets.UTF_8);
     }
 }

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/csharp/Csharp.java

@@ -26,6 +26,5 @@ public class Csharp implements TargetCodeGenerator
     public CodeGenerator newInstance(final Ir ir, final String outputDir) throws IOException
     {
         return new CSharpGenerator(ir, new CSharpNamespaceOutputManager(outputDir, ir.applicableNamespace()));
-
     }
 }